The smallest difference between two stimuli that people can perceive 50% of the time is called the absolute threshold.

Question

Quizplus · Accepted Answer

The smallest difference between two stimuli that people can perceive 50% of the time is called the "just noticeable difference" (JND), not the absolute threshold. The absolute threshold refers to the minimum intensity of a stimulus that can be detected 50% of the time.

The Smallest Difference Between Two Stimuli That People Can Perceive